In many industrial fields, like automotive and painting industry, the thickness of thin layers is
a crucial parameter for quality control. Hence, the demand for thickness measurement …

Featured Application Terahertz thickness gauging of polymers and paint layers; one-
hundred percent inspection of plastic pipes; process control. Abstract We apply a fast …

We present a low cost terahertz (THz) spectrometer with coherent detection based on two
simple and robust dipole antennas driven by two laser diodes. The spectrometer covers …

The quality of coatings in industrial applications and scientific research with thicknesses in
the micrometer range is an important criterion for quality management. Therefore, thickness …

There is a minimum measurable thickness when gauging micron-level coating films with
time-of-flight based terahertz thickness measurement technologies. To improve this …

The accuracy of thin-film characterization in terahertz spectroscopy is mainly set by the
thickness uncertainty. Physical thickness measurement has limited accuracy for thin-film …

We present a multilayer thickness measurement system based on optoelectronic continuous
wave THz spectroscopy. Due to its wide tuning range, high frequency resolution, and fast …

In this contribution, we present a highly accurate approach for thickness measurements of
multi-layered automotive paints using terahertz time domain spectroscopy in reflection …

Terahertz time-domain spectroscopy (THz–TDS) relies heavily on knowing precisely the
thickness or refractive index of a material. In practice, one of these values is assumed to be …

A bstract We compare a state-of-the-art terahertz (THz) time domain spectroscopy (TDS)
system and a novel optoelectronic frequency domain spectroscopy (FDS) system with …